*{
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}
.swiper{
	width: 800px;
	height: 450px;
	margin: 50px auto;
	margin-bottom: 10px;
	position: relative;
}
.swiper .imgList{
	width: 100%;
	height: 100%;
}
.swiper .imgList .imgItem{
	width: 100%;
	height: 100%;
	background-size: 100% 100%;
	position: absolute;
	left: 0;
	top: 0;
	opacity: 0;
	transition: all 0.5s;
}
.swiper .imgList .imgItem.active{
	opacity: 1;
}
.swiper .btnList{
	width: 100%;
	height: 100%;
	position: absolute;
	left: 0;
	top: 0;
}
.swiper .btnList .btn{
	width: 50px;
	height: 50px;
	cursor: pointer;
	background-color: rgba(0,0,0,0.1);
	line-height: 50px;
	text-align: center;
	font-size: 20px;
	transition: all 0.3s;
}
.swiper .btnList .btn:hover{
	background-color: rgba(0,0,0,0.6);
}
.swiper .btnList .btn.next{
	position: absolute;
	right: 0;
	top: calc(50% - 25px);
}
.swiper .btnList .btn.pre{
	position: absolute;
	left: 0;
	top: calc(50% - 25px);
}
.swiper .circleList{
	position: absolute;
	bottom: 0;
	width: 100%;
	height: 50px;
	display: flex;
	justify-content: flex-end;
	padding-right: 30px;
	align-items: center;
}
.swiper .circleList .circleBtn{
	width: 10px;
	height: 10px;
	border: 2px solid #999;
	background-color: #666;
	border-radius: 5px;
	margin: 0 3px;
	cursor: pointer;
	transition: all 0.3s;
}
.swiper .circleList .circleBtn:hover{
	background-color: #ccc;
	border: 2px solid #666;
}
.swiper .circleList .circleBtn.activec{
	background-color: #ccc;
	border: 2px solid #666;
}
.introduction{
	width: 800px;
	height: 50px;
	margin: 30px auto;
	position: relative;
}
.introduction .text{
	width: 100%;
	height: 100%;
	text-align: center;
	font-size: 20px;
	font-weight: 100;
	position: absolute;
	opacity: 0;
	transition:all 0.3s;
}
.introduction .text.activet{
	opacity: 0.8;
}